It also sounds like it could be a staff infection it doesn't sound like the really bad kind (MRSA). But if it is staff you really have to be careful. MRSA went through my sisters family and we had to disinfect everything and take preventative medication (all of us even though we didn't get it, but just because we were in contact with them). Staff infections look like a boil and they burst and are very contagious. Not trying to scare you just think you should definitely ask your doctor about it.

Good luck